Blooms Taxonomy Levels as applied to developing Energy Efficient Air Conditioner Compressor

A novel liquid-desiccant air conditioner that dries and cools building supply air has been successfully designed, built and tested. The new air conditioner will transform the use of direct-contact liquid-desiccant systems in HVAC applications, improving comfort and indoor air quality, as well as providing energy-efficient humidity control. Liquid-desiccant conditioners and regenerators are traditionally implemented as adiabatic beds of contact media that are highly flooded with desiccant. The possibility of droplet carryover into the supply air has limited the sale of these systems in most HVAC applications. The characteristic of the new conditioner and regenerator that distinguishes them from conventional ones is their very low flows of liquid desiccant. Whereas a conventional conditioner operates typically at between 10 and 15 gpm (630 and 946 ml/s) of desiccant per 1000 cfm (0.47 m3/s) of process air, the new conditioner operates at 0.5 gpm (32 ml/s) per 1000 cfm (0.47 m3/s). At these low flooding rates, the supply air will not entrain droplets of liquid desiccant. This brings performance and maintenance for the new liquid-desiccant technology in line with HVAC market expectations. Low flooding rates are practical only if the liquid desiccant is continually cooled in the conditioner or continually heated in the regenerator as the mass exchange of water occurs. This simultaneous heat and mass exchange is accomplished by using the walls of a parallel-plate plastic heat exchanger as the air/desiccant contact surface. Compared to existing solid and liquid desiccant systems, the low-flow technology is more compact, has significantly lower pressure drops and does not “dump” heat back onto the building’s central air conditioner. Tests confirm the high sensible and latent effectiveness of the conditioner, the high COP of the regenerator, and the operation of both components without carryover.

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Consumer preferences for energy efficient room air conditioner in Malaysia: a conjoint approach

Student Conference on Research and Development SCORED-02 ◽

10.1109/scored.2002.1033112 ◽

2003 ◽

Author(s):

Tan Mong Hock ◽

M. Shah bin Majid ◽

H. Abd Rahman

Keyword(s):

Energy Efficient ◽

Consumer Preferences ◽

Air Conditioner ◽

Conjoint Approach

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Energy audit in residential building – replacement of portable air conditioner by an energy efficient centralised air conditioner

International Journal of Ambient Energy ◽

10.1080/01430750.2018.1451378 ◽

2018 ◽

Vol 41 (2) ◽

pp. 179-182

Author(s):

K. N. Balan ◽

U. Yashvanth

Keyword(s):

Energy Efficient ◽

Residential Building ◽

Air Conditioner ◽

Energy Audit

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Life Cycle Analysis of Energy Efficient Measures in a Tropical Housing Design

Energy Conversion and Resources ◽

10.1115/imece2005-82367 ◽

2005 ◽

Cited By ~ 1

Author(s):

Michael G. Duell ◽

Lorien A. Martin

Keyword(s):

Life Cycle ◽

Energy Efficient ◽

Life Cycle Analysis ◽

Embodied Energy ◽

Thermal Mass ◽

Air Conditioner ◽

Efficient Design ◽

Housing Design ◽

Tropical Conditions ◽

Efficient Measures

Energy conservation has become an issue of global significance, which is a focus reflected in the Australian housing industry’s renewed emphasis on energy-efficient design. The Australian Building Codes Board (ABCB) has proposed to increase the stringency of the Building Code of Australia (BCA) to ensure the industry adopts energy efficient measures, including the enhancement of thermal performance and greater recognition of thermal mass in energy rating schemes. However, this proposal’s potential to effect energy savings in tropical housing is yet to be assessed. In order to determine its relative merits under tropical conditions, a standardised house design used in the Tiwi Islands of the Northern Territory (NT) was subjected to life cycle analysis, including analysis of embodied energy, the efficiency of energy saving measures and the resulting active energy consumption. This standardised house, like others in the NT, is designed for retrofitting within 10 years, which reduces the time available for savings in operational energy to exceed energy invested in installing these measures. Housing lifespan would, therefore, significantly impact upon potential benefits resulting from changes to the BCA. In addition, the spatial distances between population settlements in the NT greatly increases embodied energy values. It was found that adopting the proposed measures would result in an increase in energy efficiency through a reduction in the need for refrigerative air conditioner use, and that the embodied energy payback period would fall within the lifespan of the house. Therefore, for this specific tropical design, the BCA’s proposed measures for saving energy were found to be beneficial.

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